One vertex per element, one color per generator, with an edge from x to x·s.
(2,5)(6,8)(9,10)(11,13)(12,15)(14,16)(17,18,22,25)(19,23,27,21)(20,28,31,24)(26,30,29,32)(3,7)(6,8)(11,16)(13,14)(17,19,22,27)(18,21,25,23)(20,29,31,26)(24,32,28,30)(1,2)(3,6)(4,5)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,27)(18,23,25,21)(20,26,31,29)(24,32,28,30)(9,11,12,16)(10,14,15,13)(17,19)(18,23)(20,29)(21,25)(22,27)(24,30)(26,31)(28,32)(1,3,4,7)(2,6,5,8)(9,11)(10,14)(12,16)(13,15)(17,20)(18,24)(19,26)(21,30)(22,31)(23,32)(25,28)(27,29)(1,2)(3,6)(4,5)(7,8)(9,10)(11,14)(12,15)(13,16)(17,21,22,23)(18,19,25,27)(20,30,31,32)(24,26,28,29)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.